Year	per 100,000 population
2000	30.7
2001	30.4
2002	30.6
2003	31.6
2004	31.5
2005	31.5
2006	31.4
2007	31.5
2008	31.1
2009	31.3
2010	31.5
2011	31.2
2012	31.1
2013	31.5
2014	32.2
2015	32.1
2016	31.7
2017	32
2018	32.1
2019	32.2